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Why does my computer keep shutting down on its own?

Answer

Random computer shutdowns are caused by either an overheating processor or a failure in the operating system. Fixing an operating system's registry fixes many random shutdown issues. For a potentially overheating processor, verify that a computer's fan is spinning at a consistent rate and that it is free from dust.

Registry errors are caused by installing, uninstalling and removing software from a computer. Some pieces of software overrule others, causing conflicts in how the system is told to operate. Running a registry cleaner can fix inconsistencies, preventing registry errors from causing random shutdowns. Take care to back up the registry as-is, however, just in case the software breaks the functionality of some of the programs. Not all registry cleaners are created equal and many others are paired with dubious promises.

For overheating issues, check to make sure that the fan is clean, spins freely and varies its RPMs with the workload and internal temperature of your computer. A computer's task manager reports the internal temperature of a computer. The more open and running programs, the higher the temperature gets. Remove the computer case, and verify that the interior is clean. Do not use canned air to clean the fan and heat-sink areas. This forces dirt and dust into the sensitive areas of the computer. Instead, use a vacuum hose with a narrow nozzle, taking care not to disturb or touch any of the internal components.

Q&A Related to "Why does my computer keep shutting down on its..."
The most common reason for a PC to shut down is because it is overheating. Check the inside of your PC for dust and used canned air to remove any that you find. Be sure that the room
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Age can cause a laptop battery to not charge fully. If the computer is not fully charged it can cause it to shut down prematurely if the laptop is not plugged into an outlet. Excessive
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My first guess would be overheating. Clean the dust out of it.
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I suspect RAM problem, replace your RAM, but see your motherboard manual too. But if you have AMI BIOS, then one short beep is RAM problem.
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